The carbon-oxygen double bond in the peak for the ketone group has a slightly lower value than the table suggests for a ketone.

H 13C Nuclear Magnetic Resonance (NMR) Chemical Shifts of Vanillin with properties. You may want to go over this with a teacher if you have one.

The image below is from a Nilered video How to extract Vanillin from Vanilla Sugar, where he displays the H NMR of the final product created:. MathJax reference.

W traditional experiments teaching electrophilic aromatic substitution and carbon–carbon bond forming chemistries with greener transformations. C/ 1H NMR spectrum of 2 mM vanillin in D 2O. N Y,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Wenyi He, Fengpei Du, Yan Wu, Yinghong Wang, Xin Liu, Hongyue Liu, Xiaodong Zhao. Enter your email address below and we will send you your username, If the address matches an existing account you will receive an email with instructions to retrieve your username, By continuing to browse this site, you agree to its use of cookies as described in our, I have read and accept the Wiley Online Library Terms and Conditions of Use. Please check your email for instructions on resetting your password. Virginie Silvestre, Vanessa Maroga Mboula, Catherine Jouitteau, Serge Akoka, Richard J. Robins, Gérald S. Remaud. E-mail:  [email protected]

Natural origin of ascorbic acid: Validation by 13C NMR and IRMS. 1 Day, 3-Ethoxy-4-hydroxybenzaldehyde,Ethylvanillin.